Standard electric lamp



G. T. IRWIN.

STANDARD ELECTRIC LAMP. APPLICATION FILED MAY 22, 1919.

1,361,333, Patented Dec. 7,1920.

UNITED STATES GEORGE THOMAS IRWIN, OF TORONTO, ONTARIO, CANADA.

s rhniiifriii minim mm.

Speedster of Iietters mam.

Patented Dec. 7, 1921).,

A ini'catien fiihifay a2, 1919; Serial no. 2981886.

T 0 allwhomitma'y concern: I I\ I p I Be it known that I, Gno'RGn THIOIMAS IRWIN, of the city of Toronto, in the county of York, in the Provinceof Ontario, Canada, have invented certain new and'useful Improvements in Standard Electric Lamps, of which the following is the specification.

My invention relates to improvements in standard electric lamps, 'and the object of the invention is to simplify, cheape'n and otherwise improve the construction o'fithe lamp and provide means wherebythe' lamp proper supported by the suspension means may be held definitely in position in relation tothe supporting arm and it consists essentially ofv the following arrangement, and construction of parts as hereinafter more particularly explained. I II Figure 1, representsa perspectiye View of the upper portion of alamp standard showing my device carried thereby.

Fig. 2, is an enlarged vertical section through the major portion of my device as indicated in Fig. 1. I I I Figs. 3 and 4: are detailsof the means for holding the suspended lamp definitely in proper angular relation to its supporting arm.

In the drawings like characters of reference indicate corresponding parts in the various figures. I I I 1 indicates the standard proper, on'the upper endof which is supported a cylindrical bearing member 2 having atits lower end an annular flange 2* adaptedto be se cured by screws or other suitable means to the upper end of the standard '1. Theup'per end of the cylindricalmember '2 is provided with an externally threaded reduced perraeaiasi below the any tion 2 forming a shoulder 2 In the center of the reduced portion 2 upwardly extending pin projection 3 indicates an internally threaded cap which is screwed onto the external thr'adFQ". l The topof the is proyided witha central orifice 3", II I II I i.

l indicates the of are nanable structure by which the; lam is ried, The turnable 4 comprises a rectangular body-portion ,tlge o of the lamps. I 4 indicates a depending member extending from body l? at its lower end with an orifice lfand m- 4* with across is icated an yided' with a forked end 10.

orifice 4: The pinv projection 2 hereinbefore referred to extends up into theorince 4 the depending portion 4 extending through the orifice 3* of the cap 3, the parts I being held together by a projection 4* extending diametrically from the depending portion 4: and bearing againstthe inner face of the upper portion ofthe cap 3.v This projection 4 may be formedby screws extending'into the depending portion 4 or by any other suitable means. II II It From one face of therectangular body d" extends a horizontal flange P and from the opposite face of the body portion fi depends I 5 indicates a hollow membr from upper endof whichextends the pin I l a'nd on'one side of which is aslottedopening 5 between the side of which extendsja 'pin 5 on which is mounted a roller 51% Within the lower portion"? of the member 5Qisjournaled a pin '7 on which is mounted a roller 7 I I I I I I 8 indicates'a tubular arm provided at its inner end with a solid head 8f fro m which extend lugs 8, which mgs extend to the outside of the portion 7* and are swung upon the ends ofthe pin 7 19 indicates a ftubular member surrounding the tubular arm 8 and slidablethe'reon. The outer end of the tubular member 9 is provided with a hollow annular'bracket 9*, the ends 9f an d S) being sleeve-lil e',,the end 9 being secured around the tubular member 9 and the portion, 9 directed downward for apurpose'which will hei 'ein after appear. Between'the sides of the member 9 is secured a pin 9 onwhich is mounted a roller 9. 1Q indicates a standaid arm extending upwardly from the body portion if and proyidedfat its up'perend with horizontally directedportion" 10 'pro;

Between the sides of the forked end 10 isfjou rnaleda roller '10 Frorn'the, opposite side of the body portion l extends an upwardl'ydircted standard 11, the intermediate portion 11" of which is directed in an upwardly in" clined direction, and the outer ,portion 11. in a horizontal direction, Between; the inclined portion 11% and the horizontal ',-portion ll/ depend lugs 11 between which is jeurnaled aruler 11 The extreme end of I ing down beneath the the portion 11 is provided with an orifice 11. 11 indicates a ring extending through the orifice 11 12 indicates a counterweight provided at its upper end with a roller 12 journaled on a pin 12 carried by the upper end of the weight. 13 indicates a chain secured at one end to the ring 11 and dependroller 12*, then upward over the roller 11 and then downward beneath the roller 4 passing from the roller 4 beneath the body portion 4* and in fric tional contact therewith through the orifice 4E and over the roller 5 from which it depends through the member 5 beneath the roller 7 and then longitudinally through the inner tube 8 to the roller 9* over which it passes, the free end of the chain depending through the sleeve-like portion 9 and forming a suspension means for the lamp proper which I will hereinafter describe.

14 indicates a ring extendingaround the tubular member 9. 15 indicates a chain which is also secured to the ring 14 and extends upwardly over the roller 10 a portion of the chain being provided with an enlargement or knot 15 bearing against the fork 10 so as to limit the movement of the chain passing over the roller 10 Beneath the enlargement 15 the chain'is provided with a ring 15, the chain depending there from in slack form, the opposite end being looped up and connected to the base of the standard 10.- Instead of employing the enlargement 15* the chain may pass around a pin 15 thereby supporting the arm 8. 16 indicates a slit in the tube 9. 17 0 indicates a projection extending from the arm 8 through the slit 16, the projection having an inclined edge portion 16 terminating in a shoulder 16 The ring 14 normally rests upon the inclined portion 16 holding it out of frictional contact with the sleeve 9 and against the shoulder 16 The ring 14: is connected by a chain 16 to a lug 9 extending from the sleeve 9 for a purpose which will hereinafter appear, ing the arm 8 between such projections.

16 indicates a lamp socket supporting a shade 17. The upper end of the socket is provided with a hooked arm 16 extending at right angles to the socket. a hook secured to the lower end of the chain 13 forming the lamp suspension means. The hook 18 engages the hook arm 16 when the lamp shade 17 is to be held in a normal horizontal position.

-19 indicates a chain connected at one end to the extremity of the hooked arm 16" and atthe opposite end to the lower edge or bottom of the lamp shade 17.

When it is desired to tilt the lamp shade in an angular direction toward the position shown by dotted lines in Fig. 1 the hook arm '16" is disengaged from the hook 18 and the 19 passed through. the book 18 to the the ring 14 engag- 18 indicates desired position for suspending the lamp,

the chain 19 then depending in an angularly formed loop, one end secured to the arm 16 and the other end to the edge of the lamp shade. 20 indicates the wiring of the lamp contained in the lamp shade 17 and carried by the socket 16. The wires 20 enter the socket through the lower portion of the hook arm 16 and at their opposite end extend into the hollow'body portion 48.

In order to hold the lamp and lamp shade 17 in a definite angular position in relation to the arm formed by the tubular members 8 and 9 I provide the lower end sleeve like portion 9 with diametrically arranged notches 9 into which the upper peripheral portion of the hook 18 fits, such notches being set in a parallel position to the arm 8. By inserting the hook in the notches above described the lamp is helddefinitely in position at right angles to the arm and to the position shown in the drawing.

It will, of course, be understood that alarge shade is suitably supported by the standard 1 so as to extend over the whole lamp. When the lamp is not in usethe ring 15 is drawn down to engage the pin 15". By the initial movement the arm 8 is swung up to a vertical position. The ring 1 1 then pulls on the chain 16 drawing the outer por tion 9 upward over the portion 8 and thereby carrying the lamp 17 up to be entirely hidden by the shade.

The tubular member 9 is provided with a perforation X and when drawn outwardly so as to carry the perforation X in a line with the end of the tube 8, the weight of the lamp tends to slightly sag the tube 9 at its outer end so that the perforation X has a slight engagement with the end of the tube 8. If it were not for this arrangement, the weight of the lamp at oneend of the chain would tend to pull the tube 9 inwardly upon the tube 8. By reason of the end of the tube 8 engaging in the perforation this is prevented.

What I claim as my invention is.

1. In an electric lamp, a supporting turnable body having an orifice extending therethrough, flexible lamp suspension means passing through such orifice in contact with the upper wall thereof, an arm extending outwardly from the supporting body and carrying one end of the lamp suspension means, an arm extending outwardly from the opposite side of the supporting body and carrying the opposite end of the lamp suspension means, and' a counterweight conthrough, a depending member carried at one side of the body, a standard extending upwardly from the opposite side of the body, a flexible lamp suspension means and suittubular member carried by ably located rollers adapted to guide the flexible lamp suspension means through the depending member and the orifice of the lamp supporting body.

3. In an electric lamp, a turnable supporting body having an orifice extending there through, a depending member carried at one side of the body, a standard extending upwardly from the opposite side of the body, a flexible lamp suspension means and suitably located rollers. adapted to guide the flexible lamp suspension means through the depending member and through the orifice of the lamp supporting body to pass horizontally in frictional contact with a wall of said orifice, and counterweighting means carried by the opposite end of the flexible lamp supporting member.

4. In an electric lamp, a turnable supporting body, a depending member carried at one side of the body, a normallyhorizontal tubular arm swingably connected to the de pending member, means for freely supporting the horizontal arm in a horizontal posi tion and for raising the said arm upward and securing it in position, a lamp suspension means extending through the depending member and swing arm and adapted to carry a lamp at one end and a counterweight at the opposite end, and means frictionally bearing upon the flexible lamp suspension means intermediately of its length.

5. In an electric lamp, a turnable supporting body, a depending member carried by the supporting body at one side, a horizontal arm swung on the depending member, a the horizontal arm, means for raising the arm to an angular position, and flexible lamp suspension means extending through such arm and depending member to the opposite side of the lamp supporting body, and a counterweight for the and flexible means lamp carried by the opposite end of the lamp suspension means. 7

6. In an electric lamp, a turnable supporting body, a depending angular tubular member carried at one side of such body, a normally horizontal tubular arm swung upon the depending member and comprising an inner and outer tube telescopically connected together, means for raising the tubular arm to an angular position and telescopically extending the same, flexible lamp suspension means extending through such tubular members to the opposite side of the lamp supporting structure, and a counterweight for the lamp carried by the opposite end of the lamp suspension means.

7 In a lamp, a main support, a normally horizontal arm pivoted to said main support, a tubular member carried by said arm and slidable thereon, a flexible lamp suspension element having one end thereof passed through said arm and member to depend therefrom, and elevating means for the arm and member operable to initially swing said arm and member to a vertical position and to subsequently draw the member upwardly over the arm.

8. In a lamp, a main support, a normally horizontal arm swung upon the main support, a tubular member having alongitudinal slit carried by the arm and from which lamp suspension means is adapted to depend, a projecting portion depending from the arm through the slit and having a shoulder,

for raising the arm including an encircling ring engaging the shoulder.

GEORGE THOMAS IRWIN.

Witnesses M. EGAN, K. D. RooEoN. 

